Which of the following is NOT a religious festival in Judaism?

In the context of religious festivals in Judaism, the choice of Christmas as the correct answer is accurate because it is not a festival celebrated within the Jewish tradition. Christmas is a Christian holiday that commemorates the birth of Jesus Christ, while the other options listed—Yom Kippur, Passover, and Hanukkah—are significant Jewish festivals celebrated for specific religious purposes.

Yom Kippur, known as the Day of Atonement, is considered the holiest day in Judaism and is observed with fasting, prayer, and reflection. Passover commemorates the Exodus of the Israelites from slavery in Egypt, marked by the Seder meal and the removal of leavened products from the home. Hanukkah, or the Festival of Lights, celebrates the rededication of the Second Temple in Jerusalem and the miracle of the oil that lasted eight days.

Therefore, Christmas stands out as a holiday associated with a different faith, making it the only option that does not belong in the context of Jewish religious festivals.